British Pharmacopoeia Chemical reference substances (BPCRS)

These Primary standards are established using absolute methods and the declared content figures are determined without comparing to another substance. You should use BPCRS to perform the tests in the British Pharmacopoeia (BP) or BP (Veterinary). Do not eat BPCRS or feed them to animals – you should only use BPCRS for chemical analysis. They are not suitable for any other use.

The BPCRS Catalogue is now available for download in Excel format, updated monthly to reflect the latest listings.

New customer rules in Egypt

New customs rules in Egypt means additional actions are required by purchasers of the BPCRS if your order is over the value of £1600 or the shipment weighs more than 50kg. Please refer to the Egypt shipments guidance to learn what steps you will need to take if your order meets this criteria.  

970 items
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  • Search result 1

    Category Number 433
    Pack size 100 mg
    Substance name lithium lactate
    CAS Number 867-55-0
    Quantitative Yes
    Current batch 4923
    QTY (Max 25)
  • Search result 2

    Category Number 927
    Pack size 25 mg
    Substance name lithocholic acid
    CAS Number 434-13-9
    Quantitative No
    Current batch 3273
    QTY (Max 25)
  • Search result 3

    Category Number 697
    Pack size 100 mg
    Substance name lofepramine hydrochloride (form A)
    CAS Number 26786-32-3
    Quantitative Yes
    Current batch 4338
    QTY (Max 25)
  • Search result 4

    Category Number 635
    Pack size 100 mg
    Substance name loperamide hydrochloride
    CAS Number 34552-83-5
    Quantitative Yes
    Current batch 4580
    QTY (Max 25)
  • Search result 5

    Category Number 636
    Pack size 25 mg
    Substance name loperamide N-oxide
    CAS Number 106900-12-3
    Quantitative No
    Current batch 4482
    QTY (Max 5)
  • Search result 6

    Category Number 447
    Pack size 50 mg
    Substance name loprazolam mesilate
    CAS Number 70111-54-5
    Quantitative No
    Current batch 1604
    QTY (Max 25)
  • Search result 7

    Category Number 874
    Pack size 100 mg
    Substance name loratadine
    CAS Number 79794-75-5
    Quantitative Yes
    Current batch 3117
    QTY (Max 10)
  • Search result 8

    Category Number 875
    Pack size 25 mg
    Substance name loratadine impurity standard
    CAS Number Not applicable
    Quantitative No
    Current batch 3291
    QTY (Max 25)
  • Search result 9

    Category Number 434
    Pack size 100 mg
    Substance name lorazepam
    CAS Number 846-49-1
    Quantitative Yes
    Current batch 4150
    QTY (Max 25)
  • Search result 10

    Category Number 528
    Pack size 100 mg
    Substance name lormetazepam
    CAS Number 848-75-9
    Quantitative Yes
    Current batch 3200
    QTY (Max 5)